Question

是否可以在ForEach lambda表达式中执行此操作？

reports.ForEach(x => new PublishReport(x)
      PublishReport.PublishReports());

我尝试做的是实例化PublishReport（带有类和方法名称的裸）类传递报表对象，然后调用PublishReport类的PublishReports方法。

我所做的工作是：

reports.ForEach(x => CallPublishReports(x));

private void CallPublishReport(Report report)
{
    PublishReport publishReport = new PublishReport(report);
    publishReport.PublishReports();
}

Answer 1

您正在寻找的代码如下所示：

reports.ForEach(x => (new PublishReport(x)).PublishReport());

或者

reports.ForEach(x => {
    var report = new PublishReport(x);
    report.PublishReports();
});

您也可以将ForEach替换为Select，因为前者仅存在于PLINQ afaik中。

Answer 2

您可以首先使用Select创建实例，然后ForEach创建实例，如下所示：

reports
    .Select(r => new PublishReport(r))
    .ForEach(pr => pr.PublishReports());

Answer 3

给lambda一个身体：

reports.ForEach(x => 
{
    PublishReport publishReport = new PublishReport(x);
    publishReport.PublishReports();
});

在lambda foreach中实例化一个类和调用方法

3 个答案: